<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>
    alert(1123)

    /**
     * 这是一个测试函数
    */
    function test () {
      alert(1)
    }

    test()
  </script>
</body>
</html>